Domande di colloquio per Multitouch Sensor Algorithm Engineer presso Apple

The recruiter initially contacted me and set me up the the inventor of the multitouch technology. The interview was very brief and it involved 8 questions and no small talk. The interviewer told me I did well on the screen and he gave me a homework to work on which I have described below. I thought I did well but according to them I didn't and they rejected me after 2 weeks. I spent a lot of time on this and I believe this is the worst possible way to reject an individual. I am NEVER going to apply to apple again in my life.